forked from OSchip/llvm-project
39 lines
1.3 KiB
LLVM
39 lines
1.3 KiB
LLVM
; RUN: opt < %s -indvars -replexitval=always -S | FileCheck %s --check-prefix=ALWAYS
|
|
; RUN: opt < %s -indvars -replexitval=never -S | FileCheck %s --check-prefix=NEVER
|
|
; RUN: opt < %s -indvars -replexitval=cheap -scev-cheap-expansion-budget=1 -S | FileCheck %s --check-prefix=CHEAP
|
|
|
|
; rewriteLoopExitValues() must rewrite all or none of a PHI's values from a given block.
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
@a = common global i8 0, align 1
|
|
|
|
define internal fastcc void @d(i8* %c) unnamed_addr #0 {
|
|
entry:
|
|
%cmp = icmp ule i8* %c, getelementptr inbounds (i8, i8* @a, i64 65535)
|
|
%add.ptr = getelementptr inbounds i8, i8* %c, i64 -65535
|
|
br label %while.cond
|
|
|
|
while.cond:
|
|
br i1 icmp ne (i8 0, i8 0), label %cont, label %while.end
|
|
|
|
cont:
|
|
%a.mux = select i1 %cmp, i8* @a, i8* %add.ptr
|
|
switch i64 0, label %while.cond [
|
|
i64 -1, label %handler.pointer_overflow.i
|
|
i64 0, label %handler.pointer_overflow.i
|
|
]
|
|
|
|
handler.pointer_overflow.i:
|
|
%a.mux.lcssa4 = phi i8* [ %a.mux, %cont ], [ %a.mux, %cont ]
|
|
; ALWAYS: [ %scevgep, %cont ], [ %scevgep, %cont ]
|
|
; NEVER: [ %a.mux, %cont ], [ %a.mux, %cont ]
|
|
; In cheap mode, use either one as long as it's consistent.
|
|
; CHEAP: [ %[[VAL:.*]], %cont ], [ %[[VAL]], %cont ]
|
|
%x5 = ptrtoint i8* %a.mux.lcssa4 to i64
|
|
br label %while.end
|
|
|
|
while.end:
|
|
ret void
|
|
}
|